export interface RelativePosition {
    vertical: number | 'top' | 'center' | 'bottom';
    horizontal: number | 'left' | 'center' | 'right';
}
/**
 * @private
 *
 * 获取偏移位置
 *
 * @param {*} elemRect
 * @param {*} contentAnchorOffset
 */
export declare function getTransformOrigin(elemRect: {
    width: number;
    height: number;
}, contentAnchorOffset: number | undefined, transformOrigin: RelativePosition): {
    vertical: number;
    horizontal: number;
};
/**
 * @private
 * 获取popover目标元素的位置
 *
 * @param {*} anchorRect
 * @param {*} anchorOrigin
 */
export declare function getTargetPosition(anchorRect: Rect, anchorOrigin: RelativePosition): {
    left: number;
    top: number;
};
/**
 * @private
 *
 * 适应边界： 调整指定元素的位置，以让元素完全显示在容器的边界内部。
 *
 * @param {*} elementRect
 * @param {*} containerRect
 * @param {*} marginThreshold
 */
export declare function suitBorder(elementRect: Rect, elementOffset: {
    vertical: number;
    horizontal: number;
}, containerRect: {
    width: number;
    height: number;
}, marginThreshold: number, anchorRect: ClientRect): {
    top: number;
    left: number;
    transformOrigin: {
        vertical: number;
        horizontal: number;
    };
};
export declare class Rect {
    constructor(width: number, height: number, left: number, top: number);
    width: number;
    height: number;
    left: number;
    right: number;
    top: number;
    bottom: number;
}